It's MTV's second annual Musical March Madness! MTV News took the 64 biggest names in rock, split them up into four regions, assigned them seeds and puts them up against one another in a single-elimination series of match-ups in a winner-take-all contest. We're leaving it to you to decide an actual champ in this field of 64, so over the next few weeks, fan voting will determine who will emerge as this year's champion. It's all about the fans, and the artist with the most passionate fan base will score the awesome Musical March Madness trophy!

With the Midwest regional final already in play, it's time to move on to the West. The two bands who are competing in the Elite Eight have both come through some devastating match-ups featuring a lot of late-game heroics and back-breaking runs. It should be a thrilling finish no matter who comes out on top.

Voting for all Elite Eight match-ups will close on Thursday, March 31 at midnight. As always, you can follow all the voting here.

(3) Green Day vs. (5) Panic! at the Disco

Green Day may have started the Musical March Madness tournament quietly, but they have been putting together a string of dominating performances as of late. They came back to defeat U2 in the second round and then fell behind early to Blink-182 before opening up a commanding lead at the finish. Their opponents are Panic! at the Disco, who went wire-to-wire with top-seeded 30 Seconds to Mars in the Sweet 16 and put together an incredible comeback to defeat them. With that kind of momentum, can they be stopped? Or will Green Day take their place in the Final Four? Vote and find out!

Watch the latest update on all the Elite Eight action!

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Check out the Musical March Madness bracket and be take a look at the hoops-centric photos of some of the tournament's biggest bands.